Kurniawan, Arfani and Dwinagara, Barlian and AMRI, Nur Ali (2019) Rancangan Geometri Lubang Ledak Top Air Deck. Teknik Pertambangan UPN Veteran Yogyakarta, Yogyakarta. (Unpublished)
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Abstract
A study was conducted to designed top air deck blast hole geometry based on value of optimum air deck factor (ADF). Value of ADF was evaluated on the influence of Passing 50 (P50) fragmentation and digging time in claystone overburden blasting. Based on observation of top air deck method found the problem about fragmentation product from blasting is not optimum. Average of P50 fragmentation size is 546 mm and digging time is 14,03 second. Improving rock P50 fragmentation used top air deck blast hole geometry recomendation based on value of ADF 0,122 which produce P50 fragmentation is 244,92 mm and digging time is 10,25 second. Blast hole geometry design recomendation to get good fragmentation is hole depth 5 – 8 m, stemming 2,20 – 3,24 m, weight of explosive 64 – 110 kg, powder charge 2,20 – 3,24 m and air deck length (ADL) 0,34 – 0,59 m.
| Item Type: | Other |
|---|---|
| Subjects: | T Technology > TN Mining engineering. Metallurgy |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | DR. Ir. MT BARLIAN DWINAGARA |
| Date Deposited: | 09 Feb 2022 09:11 |
| Last Modified: | 09 Feb 2022 09:12 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/28137 |
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